Case shifting mechanism and repeat typing mechanism for power-operated typewriters and like machines



W. H. KUPPER March 25, 1952 CASE SHIFTING MECHANISM AND REPEAT TYPINGMECHANISM FOR POWER-OPERATED TYPEWRITERS AND LIKE MACHINES 16. 3.949

5 Sheets-Sheet l Filed Dec.

W. H. KUPPER March 25, 1952 2,590,777 CASE SHIFTING MECHANISM AND REPEATTYPING MEcHANIsM FOR POWER-OPERATED TYPEWRITERS AND LIKE MACHINES FiledDeC.

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w. H. KUPPER ,590,777 CASE SHIFTING MECHANISM AND REPEAT TYPINGMECHANISM FOR POWER-OPERATED TYPEWRITERS AND LIKE MACHINES 16, 1949 5Sheets-Sheet 3 jaw/www? ATTORNEYS lNvENToR afl/lgfgr MMM .www wwsm QwNMarch 25, 1952 Filed Dec.

March 25, 1952 W, KUPPER 2,590,777

CASE SHIFTLNG MECHANISM AND REPEAT TYPING MECHANISM FOR POWER-OPERATEDTYPEWRITERS AND LIKE MACHINES Filed Dec. `16, 1949 5 Sheets-Sheet 4vllll( INVENTOR william/57.529267' y fr: Bm/yzy/M March 25V, 1952 w. H.KUPPER 2,590,777 cAsE SHIETING MECEANISM AND REPEAT TYPING MECEANISM FORPowER-oPERATED TYPEWRITERS AND LIKE MACHINES Filed Dec. 5 Sheets-Sheet 5Patented Man 25, 1952 CASE SHIFTING MECHANISM AND REPEAT TYPINGMECHANISM FOR POWER-OPER- ATED TYPEWRITERS AND LIKE MA- CHINES WilliamH. Kupper, West Hartford, Conn., as-

signor to Royal Typewriter Company, Ine., New York, N. Y., a corporationof New York Application December 16, 1949, serial No. 133,322

(cl. 1in- 17) 31 Claims. l

This invention relates to power operated typewriters or like machinesand more particularly to case shifting mechanism and repeat typingmechanism for such machines. Some power operated typewriters or likemachines now known include power operating mechanism for shifting a caseshiftable element and holding it in shifted position and power operatingmechanism responsive to manipulation of a repeat key for effectingautomatically repeated typing strokes of an typing member.

An object of the present invention is to provide a power operatedtypewriter or like machine including power operated case shifting andrepeat typing mechanism operable under the conjoint control of a singlemanipulatable element e. g., a key, for shifting the case shiftableelement and automatically effecting rrepeated typing operations of oneof the typing members. Constructions embodying the invention areespecially suited for shifting a typewriter case shiftable element andeffecting automatically repeated operation of a type bar or the likehaving an underscoring character correlated to the other parts so as tobe effective for typing when the shiftable element is in shiftedposition.

Another object of the invention is to provide an improved power operatedcase shifting mechanism for typewriters or like machines.

Another object of the invention is to provide an improved arrangement ofconnections for transmitting a cushioned or shockless drive from a powermechanism to the case shiftable element of a typewriting or likemachine.

Another object of the invention is to provide a power operated caseshifting mechanism including a novel and improved arrangement forretaining the case shiftable element in shifted position after the driveconnections between the case shiftable element and a continuouslyoperating driving means have been disabled.

A further object of the invention is to provide a novel and improvedmechanism for effecting automatically repeated typing operations of atype bar or similar member.

Other objects of the invention will become apparent from a reading ofthe following description, the appended claims, and the accompanyingdrawings in which:

Figures 1 to 5 show one form of mechanism embodying the invention, andmore specifically;

Figure 1 is a view, partly in elevation and partly in vertical section,fore-and-aft of a typewriter embodying the invention, showing only someof the conventional or standard typewriter parts in order to illustratethe application of mechanism embodying the invention to a typewriterconstruction, the parts being shown in their normal or inactivepositions;

Figure 2 is a fragmentary view, partly in section and partly inelevation, showing a cushion lever device and associated elements withthe parts shown in their activated positions, that is, the positionsthey occupy when a case shift element is in upper case position;

Figure 3 is a fragmentary view, partly in vertical section, fore-and-aftof the machine, with parts shown in elevation in the positions theyoccupy when the case shift element is in upper case position;

Figure 4 is an enlarged substantially horizontal sectional view on theirregular line 4-4 of Figure 3; and

Figure 5 is an enlarged detail fragmentary sectional view on the line5-5 of Figure 3;

Figures 6 to 9, inclusive, show a case shift mechanism generally similarto the mechanism shown in Figures 1 to 5, inclusive, and also illustratemore fully a repeat typing mechanism only a part of which is shown inFigure 1, and more particularly;

Figure 6 is a view similar to Figure 1, but showing in combination thecase shifting mechanism and the repeat typing mechanism with the partsshown in their normal or inactive positions;

Figure 7 is a fragmentary view, partly in vertical fore-and-aft section,of a key operated mechanism shown in Figure 6 but with the parts shownin their actuated positions;

Figure 8 is a detail perspective view of a key or the like member foroperating both the case shifting mechanism and the repeat typingmechanism; and

Figure 9 is a detail horizontal section on the line 9 9 of Figure 6.

Figures 10 to 12, inclusive, show a further modied constructionembodying both a case shifting mechanism and a repeat typing mechanism,and more particularly;

Figure 1) is a view similar to Figure 6 but showing the modiedconstruction with the parts in their normal or inactive positions;

Figure 11 is a fragmentary vertical sectional View fore-and-aft of themachine, showing key mechanism illustrated in Figure 10, butwith theparts in their active positions; and

Figure 12 is a perspective, skeletonized view of the mechanism shown inFigures 10 and 11, with some parts omitted.

The invention may be embodied in typewriters or like machines of variouskinds. For the purposes of illustration, the invention is shown as beingembodied in an office type typewriter having, except for the powergenerating and transmitting mechanism to be described, many features incommon with the well known Royal Standard typewriter. The drawings showonly enough of the standard or known typewriter construction to assistin illustrating the manner in which mechanism embodying the inventionmay be coordinated with other parts of a typewriter construction.

The embodiment of the invention shown in Figures 1 to 5, inclusive, willbe described rst. The known construction illustrated in these figuresincludes a main frame A on which a carriage B equipped with a platen Cis mounted for letter spacing and return movements by means of a toprail I secured to the carriage, and rolling upon balls 2, which in turnare adapted to roll on a frame-mounted bottom rail or track 3.

The carriage may be driven toward the left, that is, in theletter-spacing direction, by any suitable mechanism, for example, by aspring barrel and draw band (not shown) of known or suitableconstruction. Carriage returning mechanism may be of the kind disclosedin the co-pending application of Henry J. Hart, Serial No. 21,476, ledApril 1B, 1949, now U. S. Patent No. 2,567,937, or of other suitableconstruction, preferably power-operated.

A case shift segment element 4 is mounted to shift vertically on theframe A by a construction not shown but which may be of a well knownform. Mechanism for shifting the segment includes a link 5 pivoted as at6 to the segment and pivoted as at 1 to an arm 8 mounted on a shaft 9extending lengthwise of the typewriter and mounted in any suitablemanner at its opposite ends on the frame A. The arm 8 is formed with anextension I3 provided with a hook portion II to which is connected thefront end of a counterbalancing spring I2 the rear end of which isanchored on a fixed bracket I3. As in the standard Royal ofcetypewriter, the shaft 9 may be equipped at both ends with a rock arm 8,and both of the arms 8 may be associated with links 5 andcounterbalancing springs i2.

The counterbalancing springs I2 normally maintain the type bar segment 4in its upper position with respect to the frame, which is its lower caseposition for the purposes of typing. In order to shift the segment 4downwardly to its upper case position, the shaft 9 is rockedcounterclockwise by mechanism to be described. The downward movement ofthe case shift element 4 is cushioned by springs I4 and nuts I5 mountedon studs I6 carried by opposite sides of the segment and being arrangedto move vertically through apertured fixed frame parts I1 as shown inFigure 3. Movement of the segment 4 upwardly to its lower case positionis cushioned by springs I8 and nuts I9 mounted on the studs I6 below thefixed frame parts I1.

In order to retain the segment 4 in its raised, or lower case positionso as to prevent accidental displacement which might be caused byvibration incident to operation of the machine, a segment lock oranti-vibration device, generally designated 20, is provided. The devicecomprises a cushion springv 2| carried by a mounting member 22 securedto the segment 4 by a screw 23, and a shift lock or dog 24 pivoted on 4the frame at 25 and normally engaging the bottom of the spring 2|.

The segment 4 is provided with the usual arcuate pivot wire 26 on whichthe usual complement of typing members, one only of which is shown at 21as a front strike type bar, is pivoted. The type bar 21, shown, has alower case typing character 21a and an upper case typing character 21bwhich, in the form shown, is an underscoring or underlining character.

In general, the construction described so far is of a known kind anddoes not in itself constitute the present invention. The inventionresides in other parts to be described, and the combinations of suchother parts with each other and with the parts described above.

Broadly considered, counterclockwise rocking of the shaft 9 andconsequent shifting of the segment 4 are effected by power-driven means,generally designated D, which may be made effective by depression of amanually operable shift key E. Power is transmitted from thepower-driven means D through a train of driving connections F. Theconstruction and arrangement of the parts is such that, upon depressionof the shift key E, a quickly generated power impulse is transmittedthrough a cushion device embodied in the train of connections F, to theshaft 9 so as to rock the latter and operate the associated shiftmechanism in the manner previously described.

The power-driven mechanism D is generally similar to but embodiesimprovements in mechanism disclosed in the co-pending application ofWilliam H. Kupper, Serial No. 6,066, filed February 3, 1948, now U. S.Patent No. 2,567,945. It includes a driving element, which operatescontinuously, and controllable driving connections, which normally areinoperative or ineffective, but which may be conditioned by thekoperator to effect operative driving connection between thecontinuously moving driving member and the train of connections F. Thedriver preferably is constituted by a rotatable continuously drivenmember, more particularly a toothed snatch roll or bar 28, which may beof known form, and which is adapted to be driven in the direction of thearrow a in the Figure 1 by any suitable means, but preferably by anelectric motor (not shown).

The means for transmitting drive from the driver 28 to the connections Fincludes an actuator 29 which extends fore and aft of the typewriter andabove the member 28. The actuator 29 is pivoted as at 30 to a lever 3|at a point oifset relatively to the pivotal mounting 32 of the lever ona fixed frame cross bar 33. The actuator has a forwardly extending part34 projecting under an abutment or guide plate 35 mounted on the frameA, to extend parallel to the snatch roll 28. A spring 36, interposedbetween the front end of the actuator 29 and an anchor plate 31,yieldably Vurges the actuator to rock clockwise, and thus normallymaintains the actuator in the position shown in Figure 1 with its frontend part 34 bearing against the abutment or guide plate 35. Anotherabutment 38 is disposed below the abutment 35, and is slotted to receiveand guide the lower extremity of the actuator part 34 for slidingmovements. The lever 3| normally is held in its inactive position, shownin Figure 1, by a returning spring 39 interposed between an ear 40 onthe lever and an anchor plate 4| mounted on the fixed cross bar 33 byscrews, one of which is shown at 42. The lever 3| has a stop part 43engageable with a xed stop strip 44 for limiting the returning movementof the lever under the urge of the spring 39.

In order to apply a power impulse to the train of driving connections F,the actuator 29 is operatively but indirectly connected to the drivingmember 28, the actuator itself never engaging the driving member.Mechanism for bringing out this operative connection includes aninterponent pawl element 45, pivotally mounted as at 46 on the actuator.A spring 41, anchored to the actuator 29 and connected to the pawl 45,biases or urges the latter to rock clockwise so as to move its doubletoothed nose into engagement with the snatch roll 28. Normally, the pawlis maintained out of engagement with the snatch roll by the restrainingaction of a control element or trigger 48 which is pivotally mounted asat 49 on the actuator 29. In the normal position of the trigger, itsrear end engages a holding surface 50 on the pawl so as to prevent thespring 41 from rocking the pawl 45 into drive-transmitting engagementwith the driving member 28. The pawl.45 is formed With an inclinedresetter cam face 5l which is located just below the holding surface 50,and which is acted upon by the trigger for rockingthe pawlcounterclockwise, and thus resetting it in normal, inoperative position.

Operator controlled means for bringing about operative drivingconnection between the driver 28 and the actuator 29 includes themanually operable shift key E pivoted as at 52 on the frame A. As iscustomary, the shift key structure E includes two key lever parts atopposite sides of the machine, only the one of such parts at the left ofthe machine being shown, and designated 53. The key lever part 53 isequipped with a shift vkey lock lever 54 to be described later. Theshift key lever part at the right of the machine is similar to the leverpart 53 shown, but need not be provided with a locking levercorresponding to the lever 54. Both of the shift key lever parts 53 arejoined by a rod 55 extending transversely across the front of themachine so as to form a solid unit shift key structure E. Both levers 53have rearward extensions 56 pivotally mounted on the frame pivot 52.

The key structure E has a rearward projection 51 and an upwardprojection 58 disposed behind f an arm 59 of an operating lever 68,pivoted as at 6I on a frame-mounted cross bar 62. The lever 68 hasanother arm 63 on which a limber dog or flipper 64 is pivoted at 65. Aspring 66 urges the limber dog 64 to rock clockwise to yieldably retainit in its normal position of rest against a limit stop 61 on the leverarm 63. Thepdog 64 can swing counterclockwise from the position shown inFigure 1, but cannot move clockwise from this position. A returningspring 68, interposed between the key structure E and a short arm 69 onthe lever 60, yieldably holds the lever 60 and the key structure E intheir normal positions. When the parts are in their normal positions thespring 68 holds the lever 60 so that the lower end of the limber dog 64overlies a contact ear on the actuator 29, and holds the key E so thatit bears upwardly against a cushion stop 1 I.

In operation/When the shift key Eis depressed, lthe lever 68 is rockedclockwise to cause the flipper 84 to push the actuator 29'downwardly toan initial extent sulicient to bring the trigger 48 into engagement withthe abutment 38. This causes the trigger to be rocked clockwise aboutits pivot 49, so as to release the pawl 45, which is then moved by thespring 41 into engagement with the snatch roll 28. The snatch roll thendrives the assembly constituted by the pawl 45, actuator 29 and trigger48 forwardly as a unit so as to operate the case shift mechanism throughthe train of connections F in a manner hereinafter described. When thepawl 45 is cast off from engagement with the snatch roll 28, the spring35 lifts the actuator 29 to bring the trigger 48 into engagement withthe upper, trigger-resetting abutment 35. This causes the trigger 48 tobe rocked counterclockwise, so as to move its rear end against theresetting cam face 5| of the pawl 45,' thereby restoring the latter toits inactive position.

Means are provided for adjusting or varying the amount of drivingimpulse generated by the power mechanism D. This variation or adjustmentis effected by variably limiting the extent to which the teeth on theactuator pawl nose enter tooth interspaces on the snatch roll 28 underthe urge of the spring 41 when the restraint of the trigger 48 on thepawl 45 is discontinued. In the form shown, the actuator 29 is providedwith a downwardly extending stop element or finger 12 which is disposedin front of and normally out of contact with a downwardly extending stoppart, heel, or finger 13 on the pawl 45. When the lpawl 45 is rockedclockwise by the spring 41 so as to move the teeth on the pawl nose intosnatch roll tooth interspaces, the pawl stop 13 moves toward theactuator stop 12, which may be so positioned as to be engaged by thestop 13 to arrest rocking of f the pawl 45 before the pawl teeth move tothe roots of the snatch roll tooth interspaces. By variably positioningone of the stops 12, 13, e. g., by bending the stop 12 towards or awayfrom the stop 13, the extent to which the pawl teeth enter the toothinterspaces on the snatch roll can be varied. Consequently, the anglethrough which the snatch roll rotates while in contact with the pawl,which determines the amount 0f driving of the pawl 45 and actuator 29 bythe snatch roll 28, can be varied. Any suitable means or constructionmay be provided for adjusting one of the stops 12, 13 relatively to theother, but in the preferred construction the stop 12 is formedintegrally with the actuator 29 so as to be bendable toward or away fromthe stop 13.

In typewriters or like machines in which all or some of theinstrumentalities to be operated, e. g., type bars, carriage returnmechanism, tabulating mechanism, escapement mechanism, back spacingmechanism, as well as case shift mechanism, are operated by power, itmay be desirable to provide means for varying collectively the extent ofdriving of the several actuator pawls corresponding to the pawl 45 andassociated with the other mechanism referred to. This may beaccomplished by providing a knockoi bar 14 mounted on the main frame soas to extend under the front ends of all of the actuators correspondingto the actuator 29 shown in Figure 1. Any suitable means (not shown),may be provided for adjustably tilting or otherwise variably:positioning the knock-off bar 14 so that it will be engaged by thelower ends of the actuators to control the timing of disengagement ofthe associated actuator pawls from the snatch roll.

The train of connections F is so arranged, constructed, and coordinatedwith the power mechanism D and case shift mechanism as to suppress orcushion the impact or concussion which otherwise would be transmittedabruptly from the power mechanism D to the shift mechanism. Accordingly,undesirable noise and harmful shocks are prevented, and danger ofjamming of the machine with resultant damage is eliminated. In theconstruction shown, a pull link generally designated 15 is pivoted as at3D to the actuator 29 and is pivoted as at 16 to a cushioned leverdevice generally designated 11 arranged to operate the shaft 9 forshifting the segment 4. The pull link 15 preferably is constructed so asto permit its being adjusted to different lengths. As shown, the link 15comprises two joined sections Ia and 15b. The section b is formed with ahorizontal slot 13 which receives a pin 19 secured to the section 15a.The section 15b also is formed with a horizontal slot 88 which receivesthe shank of a screw 8| having threaded connection to the section 15a.The section 'i5EL is formed with a vertical slot 82 in which is disposedthe eccentric head of a stud 84 secured to the section 15b by a nut 85.In order to adjust the length of the link 15, the screw 8| and nut 85are loosened, and the eccentric stud head 84 is turned to effectrelative endwise shifting of the link sections 15a and 15b, after whichthe screw 8| and nut 85 are tightened to lock the link sections inadjusted positions.

The pivot 38, previously referred to, is c-onstituted by a shoulder studpassing through the lever 3|, the rear end of the actuator '28 and thefront end of the link section 15b, the stud being threaded to the rearend of a shift mechanism locking bar 88. The link 15 and bar 85oscillate together, and conjointly constitute a case shift actuator andretainer, the retaining operation of which will be described later.

When the interponent and actuator 29 are moved forwardly by the snatchroll 28 in the manner previously described, the link 15 also will bemoved forwardly. This motion of the link 15 is utilized for transmittingforce through the cushi-on lever device, generally designated 11, so asto rock the shaft 9 counterclockwise and move the segment 4 downwardlythrough the operation of the arms 8 and links 5, previously referred to.The cushion lever device 11 includes a lever arm 88 which is fast on theshaft 9 and which is formed with a rearwardly extending part 89 providedwith a plurality of spring seats 98. Another lever arm 9 l, pivoted asat 92 on the arm 88, is provided with a pin projection 93 which ismovable in a slot 94 in the lever arm 88, the r ends of the slot 94being engageable by the pin 93 for limiting relative rocking or pivotalmovement of the lever arms 88 and 9 I. A drive-transmitting spring 95 isinterposed between the arm 9| and one of the spring seats 98 which maybe selected for varying the effect of the spring in urging the leverarms 9| and 88 to rock toward each other.

The pivot 16, previously referred to, is constituted by a pin secured tothe lever arm 9| and projecting into a horizontally extending slot 95 inthe rear end of the pull link 15. Normally when the parts are in thepositions shown in Figure l with the segment 4 in its raised, or lower"case position, the pin 18 is at the front end of the slot 95.

ln operation, when the shift key structure E is epressed, theinterponent 45 will become engaged with the snatch roll 28, and theinterponent and its associated actuator 29 will be driven forwardly inthe manner previously described. The forward driving of the actuator 29will impart a sudden or quickly applied impulse to move the pull link 15forwardly. The sudden forward movement of the pull link 15 will rst takeup the lost motion at the pivot 16, and when the rear end of the slot 98engages the pivot pin, the lever arm 9| will be rocked counterclockwise.This will exert a pull on the cushioning, force-transmitting spring 95,resulting in rocking the lever arm 88 counterclockwise, with consequentcounterclockwise rocking of the shaft 9 and the rock arms 8 so as topull the links 5 and segment 4 downwardly. During the initial forwardmovement of the link 15, and prior to rocking of the lever arm 9|, thesegment locking dog 24 is withdrawn from engagement with the springabutment 2| by mechanism to be described later.

It is desirable that the segment 4 remain in its lower position on theframe, that is, its upper case position, following its shifting by themechanism D, as long as the shift key structure E is held depressed.Inasmuch as the interponent 45 is cast off the snatch roll 28, and isthen returned to its normal position when the key structure E is helddepressed, it is necessary to provide additional mechanism formaintaining the segment 4 in its shifted or upper case position. Inmechanism constructed in accordance with the present invention, thelocking bar or link 86, previously referred to, extends from the pivot30 forwardly for cooperation with cooperating locking mechanism disposednear the front of the machine. Preferably, the link 88 is constructed topermit its being adjusted as to length. In the form shown, the link 86comprises two relatively adjustable sections 88a and 85h. The section85EL has a horizontal slot 91 receiving a pin 98 on the section 88h, anda horizontal slot 99 receiving a screw |00 threaded to the section 86h.A vertical slot |8| in the section 86b receives the eccentric head on astud |82 secured to the section 85EL by a nut |83. By loosening thescrew |08 and nut |83, and turning the stud |82, the desired r relativeadjustment of the sections 888L and 86b may be effected. rEhe sectionsmay then be locked in adjusted position by tightening the screw |08 andnut |83.

As shown in Figure 5, the front end of the bar section 85a extendsalongside the end of the upper abutment 35 previously referred to. Thebar section 88a is provided with guide studs |04 extending respectivelyabove and below the abutment 35, and is formed with a horizontallyextending rear |85 which engages the side of the frame A for guiding thebar section 86 and maintaining it against displacement away from theadjacent end of the abutment 35.

When the parts are in the normal positions shown in Figure 1, anupstanding projection |06 at the front of the bar 86 is positionedunder, and in contact with, the substantially fiat horizontal surfaceunder the nose of a retaining device comprising a, pawl |91 mounted torock on a nxed frame pivot |88. The pawl nose is formed with a surface|88 inclined to the direction of oscillation of the bar 85 and adaptedto engage a similarly inclined surface on the projection |06 when thebar 85 is in its shifted position as shown in Figure 3, the pawl thustending to maintain the bar 85 releasably in its shifted position. Forurging the pawl |91 to the retaining position shown in Figure 3, aspring I l0 is interposed between a tail I|| on the pawl and a holdingor locking part, as shown a dog ||2, pivoted at ||3 on a bracket I |4secured to the cross bar |62. The spring |I urges both the pawl |01 andthe dog I2 clockwise. The dog II2 normally is held in the retractedposition shown in Figure 1 by engagement of the shift key extension orblocking part 58 with an ear or blocking part ||5\on the dogl I2.

In operation, when the key E is depressed, the extension 58 retreatsfrom the part ||5 of the dog I I2, thereby enabling the dog to rockclockwise into the position shown in Figure 3 as soon as the pawl |01has moved to its Figure 3 position consequent upon sliding of theprojection |06 under the pawl |01 and to the left of the pawl inclinedsurface |09. Thus, when the shift actuator 15, 86 has been movedforwardly by the actuating mechanism D, it will .be locked or retainedin its shifted position by the pawl |01 the holding tendency of whichwill be supplemented by the dog I I2 when the lower end of the dogengages the pawl and prevents it from rocking counterclockwise torelease the projection |66. When the shift key E is released so as topermit its returning spring 68 to raise it, the key extension 58 pressesagainst the ear ||5 and rocks the dog I|2 clear of the top of the pawl|91, thus releasing the pawl for counterclockwise pivotal movement. Thesimilar inclinations of the pawl nose surface |09 and of the engagingpart of the projection |06 on the bar 86 are such that these mutuallyengageable parts constitute cam means by which the pawl |01 is cammedcounterclockwise under the urge of the counterbalancing springs I2,which constantly tend to pull the bar 86 rearwardly and shift thesegment `4 to lower case position. Preferably, the lower end of the dog||2 and the top surface of the pawl |01 are notched or cut away so ascooperatively to limit the clockwise movement of the dog I|2 when it isrocked to the holding position shown in Figure 3.

As previously stated, it is necessary to retract the anti-vibration dog24 from its engagement with the spring 2| prior to shifting the segment4 downwardly to its upper case position. In the form shown in Figures 1to 5, mechanismfor accomplishing this purpose includes an ear ||6extending upwardly from the locking bar section 86h. A wire link |I1 ispivoted as at |18 to the ear I|6 and as at ||9 to the dog 24. When thelocking bar 8B is moved initially forwardly, the link ||1 rocks the dog24 counterclockwise so as to release the segment 4 for its shiftingmovement which begins later in the cycle after the taking up of the lostmotion at the pivotal connection 16. As shown, the link ||1 is of awellknown adjustable form.

The embodiment of the invention shown in Figures 1 to 5, inclusive, alsocomprises mechanism for locking the shift key structure E in itsdepressed position. y The shift key lock lever 54, previously referredto, is pivoted as at |20 on the left-hand shift key lever 53 and isformed with a depending part |2| having spaced stop ears |22 engageablerespectively with opposite sides Yof the key lever 53. A tail |23 on theshift lock key lever 54 projects under the heel |24 of a latching dog|25 pivoted as at |26 on the shift key lever 53. A spring |21,interposed between the lower end part of the latching dog |25 and theshift key lever 53, urges the latching dog |25 counterclockwise towardthe normal position in Figure 1,

and thereby urges the shift key locking lever 54 clockwise to its normalposition. The lower end of the dog |25is formed with a nose |28 which 10normally is disposed clear of, but which is adapted to engage under, akeeper |29 mounted on the frame.

In operation, when the shift key lock lever 54 is depressed, thelatching dog |25 is rocked clockwise to bring its nose 28 against therear face of the keeper |29, and the entire shift key structure E isdepressed until the nose |28 passes below and then projects under thekeeper 29. When the finger pressure on the shift lock key 54 is removed,the shift key structure E is held in its depressed position byengagement of the nose |28 with the keeper |29, as shown in Figure 3. Inorder to return the parts to lower case positions, the shift key lever53 is depressed so as to move the nose |28 of the latching dog out ofcontact with the keeper |29. This will enable the spring |21 to rock thelatching dog |25 counterclockwise so that, upon relieving the pressureon the shift key lever 53, the entire key structure E will be returnedto its normal or lower case position by the spring 68.

Figures 6 to 9, inclusive, show a typewriter embodying a caseshiftingmechanism generally the same as the mechanism -described with referenceto Figures 1 to 5, inclusive, and also a repeat typing mechanism, only apart of which is shown in Figure 1. The case shifting mechanism includedin the embodiment shown in Figures 6 to 9 is so similar to the mechanismdescribed with reference to Figures 1 to 5 that no repeated detaileddescription of the mechanism shown in Figures 6 to 9, inclusive, isbelieved to be necessary. Some of the parts of the case shiftingmechanism shown in Figures 6 to 9, inclusive, are identical tocorresponding parts described with reference to Figures 1 to 5,inclusive, and are designated by the same reference characters. Otherparts of the case shifting mechanism shown in Figures 6 to 9, inclusive,which differ from the mechanism shown in Figures l to 5, inclusive,mainly as to form will be referred to briefly. 'i

Figure 6 shows a portion of a case shift actuator |30 which correspondsto the actuator 29 shown in Figure 1. 'I'he actuator |30 is pivoted atI3| to a combined pull link and shift locking bar or case shift actuatorand retainer |32 which corresponds to the link 15 and the bar 86 in theformA shown in Figures 1 to 5, inclusive. The bar |32 is formed in onepiece and is not adjustable as to length except by mauling or bending.Such a unitary bar may be used with good results when manufactured toclose tolerances. The rear end of the bar |32 is connected tothe shiftarm 8, preferably by a cushion lever device, not shown in Figure 6, butwhich may be of the kind shown in Figure 1. The front end of the bar |32rides on top of the abutment 35 instead of having guide lugscorresponding to the lugs |04 in the construction shown in Figures 1 to5, inclusive. The projection |33 on the front end of the bar |32 isrounded, and the cooperating locking pawl |34 has its tail |35 extendingmore forwardly than the tail of the pawl |01 shown in Figures 1 to 5,inclusive` The holding dog` |36 is pivoted as at |31 on a bracket |36extending rearwardly from a fixed frame part instead of downwardly, asdoes the bracket I4 shown in Figures 1 and 3.

A further difference between the constructions shown in Figures 1 to 5,inclusive, and in Figures 6 to 9, inclusive, is that in the latter formthe shift lock dog 24 is operated directly by key effort instead of bythe shift actuator I36. As shown in Figures 6 and '1, the shift keystructure 11 E is formed with a projection |39 connected to the dog 24by a link |40 which is pivoted to the projection |39 as at |4|, and ispivoted to the dog 24 as at |42.

The shift mechanism actuator |30 shown in Figure 6 is equipped with aninterponent pawl and trigger and associated elements not shown, butwhich correspond to the interponent pawl 45, trigger 48, and associatedelements shown in Figure 1. It will be apparent that the operation ofthe case shift mechanism, per se, under the control of the shift keystructure E is essentially the same as the operation of the mechanismshown in Figures 1 to 5, inclusive.

Mechanism shot-.n in Figures 6 to 9 for effecting repeated typingoperations of the typing member 21 includes a single tooth interponent|43 and associated mechanism corresponding to the interponent 45 andassociated mechanism shown in Figure 1. r[he interponent |43 ispivotally mounted as at |44 on an actuator |45 which, in turn, ispivoted as at |46 to a lever |41 mounted to rock on a nxed frame pivot|48 on a cross bar |45. The upper end of the lever |41 is pivoted at |50to a wire link |5|, the rear end of which is pivoted at |52 to the heel|53 of the typing member 21.

The interponent |43 is formed similarly to the interponent 45 so as tohave a holding surface |54 and a re-setting cam surface |55. terponent|43 is controlled by a trigger |56 pivotally mounted on the actuator |45as at |51. When the trigger |56 is rocked clockwise so as to release theinterponent |43, the latter will be driven by the snatch roll 28 so asto move the assembly constituted by the interponent |43, trigger |56,and actuator |45 forwardly, rock the lever |41 forwardly, pull the link|5| forwardly, and thus move the type bar 21 to printing position.

The actuator |45 and interponent |43 have relatively adjustable parts|58 and |59, respectively, for Varying the driving effort transmitted tothe type bar 21. In other respects the parts of the mechanism D shown inFigure 6 are generally similar to parts embodied in the constructionshown in Figures l to 5, inclusive, so that no more detailed descriptionof the mechanism D shown in Figure 6 is considered necessary.

As previously stated, the type bar 21 is provided with a lower casecharacter 21a and an upper case character 21io which, in the formdescribed, is an underlining character. In accordance with theinvention, mechanism is provided for effecting a single type impressionby the character 21b or, alternatively, to effect automatically repeatedimpressions by the underlining character 21h. In accordance with afurther feature of the invention, the movement of the segment 4 to uppercase position and the automatic repeated operation of the type bar 21may be eifected by depression of a single key or other manuallymanipulatable element, or alternatively typing member 21b may be causedto perform a single typing operation by depressing another key when thesegment 4 has been shifted to upper case position by depression of theshift key structure E.

The mechanism for effecting single operations of the type bar 21includes a key lever |66 pivoted on a xed part of the frame as at |88.An upward extension |61 on the rear end of the key lever |60 projectsbehind the depending arm |62 of a lever |63 pivoted at 6| on the framecross bar 62. Pivoted at |84 on another arm |65 of the lever |53 is alimber dog or flipper |66 urged The inclockwise by a spring |61 butlimited in its clockwise movement by a stop ear |68 on the level' arm|65. The lower end of the ilipper |66 is disposed above a contact ear|69 on the type bar actuator |45 previously referred to. A spring |10 isinterposed between the key lever |60 and an arm |1| on the lever |63 fornormally maintaining the parts in the positions shown in Figure 6.

In operation, when the single impression character key lever |68 isdepressed the lever |63 is rocked clockwise, causing the ipper |66 toengage the actuator ear |69 and move the actuator |45 downwardly untilits associated trigger |56 is rocked to pawl-releasing position byengagement with the lower abutment 38. The pawl or interponent |43,having been thus released, will move into engagement with the snatchroll 23 so as to be driven forwardly together with the actuator |45,thus rocking the lever |41 and actuating the type bar 21 through thelink connection |5|. When the interponent |43 has been cast off thesnatch roll 28 the parts will return to their normal positions eventhough the key |60 be held depressed so that only a single actuation ofthe type bar 21 will take place. For a more detailed description of thesequence of operation of the parts for actuating the type bar 21,reference is made to the detailed description of the analogous operationof the interponent 45 and its associated parts shown in Figure 1.

It will be understood that the operation of the type bar 21 effected bydepression of the key |60 is independent of operation of the caseshifting mechanism and its associated controlling devices. Thus the typebar 21 can be caused to perform a single typing operation regardless ofthe position in which the y.type bar segment 4 is set. Moreover, thecase shift mechanism may be operated by depressing the key structure Ewithout operating the type bar 21.

It is, however, a further feature of the invention that the caseshifting mechanism and the mechanism for operating the type bar 21 maybe articulated so as to be operated under the control of a singlemanually manipulatable element rst to shift the segment 4 to upper caseposition, and then automatically to eiiect repeated operations of thetype bar 21 as long as the manipulatable element is held in manipulatedposition. Such an arrangement has particular advantages when the typebar 21 has an upper case underscoring character as shown at 21b inFigure 1.

In the form shown, a combined case shift and repeat typing operation keylever |12 has its front arm |13 extending through a slot |14 in thefront wall of the typewriter mask or cover. The lever |12 is pivoted asat |15 and has a rearwardly extending arm |16 pivoted at |11 to theupper end of a link |18, the lower end of which is pivoted at |19 to therear end of a lever |80 pivoted at |08. A link |8| is pivoted at |82 tothe lever |86 and is pivoted at |83 to an arm |84 fixed to a rock shaft|85. A link member is pivoted at |81 to another arm |84a fixed to theshaft |85, and extends upwardly with its upper end part being connectedto the type bar actuator |45 by a pin and slot one-way-acting motiontransmitting connection |88. The arrangement is such that when the linkmember |86` is moved downwardly the actuator |45 is lowered so as toeiect releasing of the pawl |43 by the trigger |56 and consequentdriving engagement of thepawl with the snatch roll 2S. However, when thelink |86 is not moved, the actuator |45 may still be moved downwardly bythe key |60, lever |63 and flipper |66' in the manner previouslydescribed.

Normally, the lever |12, the link |86 and the intervening connectionsare in the positions shown in full lines in Figure 6 with a stop part|89 engaging a xed frame part |90 so as to determine the unactuatedpositions of the parts. In order to effect repeated operation of thetype bar 21, the key |12 is depressed to the dotted line position shownin Figure 6 which is determined by engagement of a stop part |9| withthe xed frame part |90. Depression of the key |12 lifts the link |18 soas to rock the lever |80 counterclockwise, lift the link |8|, rock themovable part constituted by the arms |84 and |848, and the shaft |85clockwise, and move the link |86 downwardly to lower the actuator |45.Lowering of the actuator |45 causes the trigger |56 to engage the lowerabutment 38 and be rocked to interponent-releasing position, whereuponthe interponent |43 engages the snatch roll 28 and is driven forwardlytogether with the actuator |45 to operate the type bar 21. During theforward movement of the actuator |45, the link |86 will rock clockwiseabout its pivot |81. When the interponent |43 is cast off the snatchroll 28 the actuator |45 will return or move rearwardly while the link|86 rocks clockwise and continues to hold the actuator down so as toprevent engagement of the trigger |56 with the upper abutment 35.Consequently, the trigger |56 will not be rocked to re-set the pawl |43,and the latter will re-engage the snatch roll 28, and will again bedriven forwardly to effect another operation of the type bar 21.Repeated cycles or operations of the actuator and type bar will takeplace in this manner as long as the key |12 is held depressed withconsequent holding of the link |86 in its lowered position.

In order that the machine may be conditioned for typing the upper casecharacter 21b when repeated operation of the type bar 21 is effected bydepressing the key |12, a one-way-acting connection is provided fordepressing the shift key structure E when the key lever |12 is actuated.In the form shown, the lever |80 has a rounded front end |92 normallydisposed above a contact part |93 on the case shift lever 53. Thecontact part |93 is formed with high points |94 and |95 and anintervening recessed part |96 which is substantially concentric with thepivot |08 when the parts are in their normal positions.

In operation, when the lever |80 is rocked counterclockwise bymanipulation of the key lever |12, the rounded end or bearing part |92engages the high point |94 on the contact or bearing part |93 andtransmits force from the repeat key |12 to the shift key so as to rockthe shift key lever 53 downwardly concomitantly with depression of thekey |12 to thus effect shifting of the segment 4 to its upper caseposition in the manner previously described. When the key lever |12 andassociated parts are in their completely actuated positions, the roundedend |92 of the lever |80 will be in contact with the recessed part |96of the contact member |93 so as to hold the shift key lever 53 depressedwith the application of minimum finger pressure on the key lever |12.The yparts are so proportioned and related and the timing of themechanism is such that when the key lever |12 is depressed the shiftmechanism will move the segmentfd toits upper case position before thetype bar 21 arrives in printing position on its first stroke.

The case shift mechanism shown in Figures 1 to 5, inclusive, is intendedfor use in connection with the repeat type bar operating mechanismdescribed with reference to Figure 6. However, to avoid unduecomplication of the drawings, Figure 1 shows only a part ofthe repeattype bar operating mechanism as including the lower end of the link |8|,the shaft |85, the rock arms |84 and |845, all of which have beendescribed with reference to Figure 6.

Figures 10 to 12, inclusive, illustrate a modied construction which,like the forms previously described, includes a single manipulatablemember for effecting case shifting operation and automatically repeatedtype bar operation. The mechanism for articulating the case shiftmechanism and repeat typing mechanism differs somewhat from thearticulating mechanism previously described and will be explained insome detail. However, the shift mechanism shown in Figures 10 to 12,inclusive, and the repeat typing mechanism shown in these figures,considered alone, are so generally similar to the shift mechanism andrepeat typing mechanism described above that a brief description of theshift mechanisms and the repeat typing mechanisms will sufce. Generalystated, parts of the case shifting mechanism and the repeat typingmechanism shown in Figures 10 to 12, inclusive, are designated by thesame reference numerals as those designating corresponding partspreviously described, the numerals designating these parts in Figures 10to 12, inclusive, however, being primed. Thus, the snatch roll 28 shownin Figure 10 corresponds to the snatch roll 28 shown in Figures 1, 3 and6, the shift actuator |30' shown in Figures 10 to 12, inclusive,corresponds to the shift actuator |30 shown in Figure 6, the repeattyping actuator shown in Figures 10 to 12, inclusive, corresponds to theactuator |45 shown in Figure 6, and so on. It may be observed that someof the parts shown in Figures 10 to 12 differ in specific constructionfrom the corresponding parts shown in the figures described previously,but not in such manner as to affect the basic combination or mode ofoperation of the parts. For exampley the interponent pawls |43 and 45',shown in Figures 10 to 12, differ from their counterparts |43 and 45 byhaving ears |91 and |98 engageable with depending parts |99 and 200 oftheir associated actuators. The ears 91 and |98 project horizontally andmay be bent or adjusted to vary the extent to which the associatedinterponents or pawls move into the tooth interspaces in the snatchroll, thus serving the same purpose as the relatively adjustable parts12-13 in Figure 1, and |58|59 in Figure 6. Other minor differences inconstruction observable in Figures 10 to 12, inclusive, lneed not bedescribed.

The means for articulatingthe case shiftingand repeat typing mechanismsshown in Figures 10 to 12, inclusive, comprises a lever 20| extendinglongitudinally of and in front of the machine and being pivoted as at202 on the machine frame. An arm 203 of the lever 20| is equipped with akey button 204, the other arm 205 of the lever 20| being pivoted as at206 to the upper end of a link 201, the lower end of which is pivoted asat 208 to a lever 269 mounted to rock on a pivot 52. The rear end of thelever 209 is pivoted at 2|8 to the lower end of a link 2| I, the top ofwhich has a pin and slot one-way-acting'connection at 2l2 with the typebar actuator |45.

In operation, when the key 204 is depressed the lever is rocked to liftthe link 201, rock the lever 209, and move the link 2 ll downwardly soas to effect engagement of the interponent pawl |43' with the snatchroll 28', resulting in operation of the actuator |45' and type bar 21.Having in mind the previous description, it will be understood that thetype bar 2T will be operated repeatedly as long as the key 204 is helddepressed.

In order that the key 204 may also effect operation of the shiftingmechanism, a thrust link 2l3 is pivoted at 2|4 to the arm 203 of the keylever 20|, and has its lower end formed with a fork 2i5 which receivesthe rod 55 joining the shift key levers 53. The fork 215 and rod 55provide a one-way-acting connection for transmitting depressing movementof the key 204 to the shift key E'. When the lever 20| is rocked bydepressing the key 204, the link 2|3 is moved downwardly so as to pushthe rod 55' and depress the shift key structure E. Engagement of theshift mechanism interponent 45 with the snatch roll 28 and consequentoperation of the shift mechanism will then ensue in the mannerpreviously described.

Although modications of structures embodying the invention have beenillustrated, they have, as common advantages, a lightness of the fingerpressure required for effecting case shifting and maintaining theshiftable element in shifted position, and the flexibility of operationspermitted by the novel means articulating the case shifting mechanismand the repeat typing mechanism. Thus, in machines embodying theinvention, the shiftable element may be operated alone, or together withtherepeat typing mechanism to effect continuous typing by an .upper casecharacter, or the same upper-case character may be typed only once.

The constructions described with reference to the accompanying drawingsembody the invention in preferred forms, but it is intended that they beconsidered as illustrative rather than definitive of the invention. Theinvention is defined in the claims.

I claim:

l. In a power operated typewriting or like machine, a case shiftelement; a power driven member; a case shift actuator; means connectingsaid actuator to said element; a shift key; means operable by said keyfor effecting driving of said actuator and said element to shiftedpositions by said member; a retaining device movable from a normallyinactive position to a position of engagement with said actuator inwhich position said device is adapted to be held for retaining saidactuator in its shifted position; a holding part movable from a normallyinactive position towards a position of engagement with said retainingdevice in which position said part holds said device in retainingengagement with said actuator; and means associated with said key andnormally maintaining said holding part out of operative engagement withsaid retaining device but being movable by said key to release saidholding part and enable it to move into holding engagement with saidretaining device when said key is in actuated position.

2. In a power operated typewriting or like machine, a case shiftelement; a power driven member; a case shift actuator; means connectingsaid actuator to said element; a shift key; means operable by said keyfor effecting driving of said actuator and said element to shiftedpositions by said member; a retaining device spring-urged to move from anormally inactive position to a posi tion of engagement with saidactuator in which position said device is adapted to be held forretaining said actuator in its shifted position; a holding partspring-urged to move from a normally inactive position towards aposition of engagement with said retaining device in which position saidpart holds said device in retaining engagement with said actuator; andmeans associated with said key and including a blocking part normallymaintaining said holding part out of operative engagement with saidretaining device but being movable by said key to release said holdingpart and enable it to be moved by spring urge into holding engagementwith said retaining device when said key is in actuated position.

3. In a power operated typewriting or like machine, a case shiftelement; a power driven member; a case shift actuator; means connectingsaid actuator to said element; a shift key; means operable by said keyfor effecting driving of said actuator and said element to shiftedpositions by said member; a retaining device movable from a normallyinactive position to a position of engagement with said actuator inwhich position said device is adapted to be held for retaining saidactuator in its shifted position; a holding part movable from a normallyinactive position towards a position of engagement with said retainingdevice in which position said part holds said device in retainingengagement with said actuator; a spring connected respectively to saidretaining device and said holding part and urging said retaining devicetowards its position for retaining said actuator in its shiftedposition, and urging said holding part towards its position ofengagement with said retaining device; and means associated with saidkey and normally maintaining said holding part out of operativeengagement with said retaining device but being movable by said key torelease said holding part and enable it to be moved by said spring intoholding engagement with said retaining device when said key is inactuated position.

4. In a power operated typewriting or like machine, a case shiftlelement; a power driven member; a case shift actuator; means connectingsaid actuator to said element; a shift key; means operable by said keyfor effecting driving of said actuator and said element to shiftedpositions by said member; a projection on said actuator; a pivotedretaining pawl having a surface slidably engaged by said projectionduring operation of said actuator and a nose adapted to move intolocking engagement with said projection when said actuator has moved toits completely shifted position wherein said projection has moved clearof said pawl surface; a pivoted holding dog normally operativelydisengaged from said pawl; means biasing said pawl into engagement withsaid projection and biasing said dog into operative engagement with saidpawl when the pawl nose is in locking engagementl with said projectionfor holding said pawl nose in locking engagement with said projection;and a blocking part normally maintainingr said dog operativelydisengaged from said pawl but being operable in response to actuation ofsaid key for enabling said biasing means to move said dog into operativeengagement with said pawl.

5. In a power operated typewriting or like machine, a case shiftelement; a power driven meinber; a case shift actuator; means connectingsaid actuator to said element; a shift key; means operable by depressionof said key for effecting driving of said actuator and said element toshifted positions by said member; means controlled by said key uponraising thereof for eifecting re turning of said actuator and saidelement to their non-shifted positions; a retaining device movable froma normally inactive position to a position of engagement with saidactuator in which position said device is adapted to be held forretaining said actuator in its shifted position, the mutually engageableparts ofA said retaining device and said actuator comprising cam meansoperabie by said actuator returning means when said device is not heldfor camming said device out of retaining engagement With said actuator;a holding part movable from a normally inactive position towards aposition of engagement with said retaining device in which position saidpart holds said device in retaining engagement with said actuator; andmeans associated with said key and normally maintaining said holdingpart out of operative engagement With said retaining device but beingmovable by said key to release said holding part and enable it to moveinto holding engagement with said retaining device when said key is inactuated position, and being movable by raising of said key for movingsaid holding part out of operative engagement with said retainingdevice.

5. In a power operated typewriting or like machine, a case shiftelement; a power driven member; a case shift actuator; means mountingsaid actuator for oscillation, said actuator being formed with a firstsurface extending generally in the direction of oscillation and a secondsurface inclined with respect thereto; means connecting said actuator tosaid element; a shift key; means operable by said key for effectingdriving of said actuator and said element to shifted positions by saidmember; means for returning said actuator and said element to theirnormal nonshifted positions; a pivoted pawl having a first surfacenormally engaging said rst actuator surface and extending generally inthe direction of oscillatory movement thereof and having also aretaining surface inclined with respect to said direction of oscillatormovement; means so biasing said pawl as normally to hold its said rstsurface in engagement with said actuator first surface and being adaptedto rock said pawl when said actuator first surface moves beyond saidpawl rst surface consequent to shifting of said actuator so as to bringsaid pawl into actuator-retaining position with said pawl and actuatorinclined surfaces in engagement with each other, the pawlbiasing meanshowever being in itself insufficiently strong to resist displacement ofsaid inclined pawl surface from engagement with said actuator inclinedsurface by the camming action of saidl surfaces upon each other underthe urge of said actuator returning means; a holding dog normallyoperatively disengaged from said pawl; and means responsive to movementof said key to shift-effecting position for moving said dog intoengagement with said pawl for holding said pawl. in saidactuator-retaining position as long as said key is held depressed.

, 7. In a power operated typewriting or like machine, a case shiftelement; a power driven member; a case shift actuator; means connectingsaid actuator to said element; a shift key; means operable by said keyfor effecting driving of said actuator and said element to shiftedpositions by said member; means for returning said actuator and saidelement from shifted to non-shifted positions; a retaining devicemovable from a 'normally 8. In a power operated typevvriting or likemachine, a case shift element; a power driven member; case shiftactuator; a shift lock for 'normally holding said element in normal,non-shifted position; means connecting said lock to said actuator to beoperated thereby to non-locking position to enable said element to beshifted; meansy connecting said actuator to said element; a shift key;means operable by said key for effect-ing driving of said actuator andsaid element to shifted positions by said member; a retaining devicemovable from a normally inactive position to a position of engagementwith said actuator in which position said device is adapted to be heldfor retaining said actuator in its shifted position; a holding partmovable from a normally inactive position towards a position ofengagement with said retaining device in which position said part holdssaid device in retaining engagement with said actuator; and meansassociated with said keyand normally maintaining said holding part outof operative engagement with said retaining device but being movable bysaid key to release said holding part and enable it to move into holdingengagement with said retainincr device when said key is in actuatedposition.

9. In a power operated typewriting or like machine, a case shiftelement; a power driven member; a case shift actuator; a shift lock fornormally holding said element in normal, non-shifted position; meansconnecting said actuator to said element; a shift key; means operable bysaid key for moving said lock to non-locking position to enable saidelement to be shifted and for effecting driving of said actuator andsaid element to shifted positions by said member; a retaining devicemovable from a normally inactive positiontc a position of engagementwith said actuator in which position said device is adapted to be heldfor retaining said actuator in its shifted position; a holding partmovable from a normally inactive position towards a position ofengagement with said retaining device in which position said part holdssaid device in retaining engagement with said actuator; and meansassociated with said key and normally maintaining said holding part outof operative engagement with said retaining device but being movable bysaid key to release said holding part and enable t-o move into holdf ingengagement with said retaining device when said key is in actuatedposition.

l0. Ina power operated typewriting or like machin,"`a case shiftelement; a power driven member; a case shift actuator; cushioneddrivetransmitting connections between said actuator and said elementcomprising a first lever'connected to said element, a second leverpivotally' mounted with respect to said first lever, a force'-transniitting'spring connecting said levers, and means connecting saidsecond lever to 'said acatea-vvv tuator; a shift key; 'means operable bysaid key for effecting driving of said actuator and said element toshifted positions; a retaining device movable from a normally inactiveposition to a position of engagement with said actuator in whichposition said device is adapted to be held for retaining said actuatorin its shifted position; 'a holding part movable from a normallyinactive position towards a position of engagement with said retainingdevice in which position said part holds said device in retainingengagement with 'said actuator; and means associated with said key andnormally maintaining said holding part out of operative engagement withsaid retaining device but being movable by said key to release saidholding part and enable it to move into holding engagement with saidretaining device when said key is in actuated position.

'11. In a power operated typewriting or like machine, a case shiftelement; a power driven member; a case shift actuator; cushioneddrivetransmitting connections between said actuator and said elementcomprising a first lever connected to said element, a second leverpivotally mounted with respect to said rst lever, a forcetransmittingspring connecting said levers, and means connecting said second lever tosaid actuator; a shift key; means operable by said key for effectingdriving of said actuator and said element to shifted positions; meansfor returning said actuator and said element from shifted to non-shiftedpositions; a retaining device movable from a normally inactive positioninto a position in which it tends to prevent return movement of theactuator but insuiciently, in itself, to prevent such movement; anormally ineffective holding part; and means responsive to operation ofsaid key and resultant shifting of said actuator and said element forrendering said holding part effective to supplement said tendency ofsaid retaining device whereby said actuator and said element are held inshifted positions jointly by said retaining device and said holding partas long as said key is held in operated position.

12. In a power operated typewriting or like inachine, a case shiftelement; a power driven member; a case shift actuator; means connectingsaid actuator to said case shift element; an interponent mounted on saidactuator for movements into and out of operative engagement with saiddriven member and being biased into engagement therewith; a triggernormally maintaining said interponent disengaged from said drivenmember; a shift key; means responsive to depression of said key foractuating said trigger to release said interponent and enable it to moveinto engagement with said driving member, whereby said actuator will bedriven by said driven member so as to operate said case shift element;trigger re-setting means effective upon return movement of said shiftkey when said driven member is stationary for moving said triggerreversely to its releasing movement and thereby disengaging saidinterponent from said driving member; means for returning said actuatorand said element from shifted to non-shifted positions; a retainingdevice movable from a normally inactive position into a position inwhich it tends to prevent return movement of the actuator butinsuiiiciently, in itself, to prevent such movement; a, normallyineffective holding part; and means responsive to operation of said keyand resultant shifting. ofY said actuator and said element forrendering. said holdingv part effective to supplement. 'said' tendency.of said retaining device 20 whereby said actuator and said element areheld in shifted positions jointly by said retaining device and saidholding part as long as said key is held in operated position.

13. In power operating mechanism for a typewriting or like machine, atyping member; a power-driven member; an actuator; means cont nectingsaid actuator to said typing member; an interponent mounted on saidactuator for movements into and out of operative engagement with saiddriven member and being biased to move from a normal position in whichit is disengaged from said actuator into operative engagement therewith;a trigger mounted on said actuator and normally maintaining saidinterponent disengaged from said driven member, said actuator,interponent, and trigger constituting an assembly of conjointly movableparts; a typing control mechanism including an element manipulatable foractuating said trigger to release said interponent and enable it to moveinto engagement with said driven member whereby said actuator will bedriven by said driven member to operate said typing member during thecourse of which operation said interponent is thrown out of engagementwith said driven member; and means for then returning said actuatortowards Aits normal non-actuated position, said typing control mechanismincluding means comprising a member operable by said manipulatableelement and being connected to and having a part movable with saidassembly during operating movements of said assembly for maintainingsaid trigger in actuated, interponent-releasing position when saidmanipulatablc element is held in manipulated position, whereby, duringreturning of said actuator towards its normal non-actuated position,said interponent will re-engage said driven member to be repeatedlydriven thereby for effecting repeated driving of said actuator andrepeated typing operations of said typing member.

14. In power operating mechanism for a typewriting or like machine, atyping member; a power-driven member; an actuator; means connecting saidactuator to said typing member; an interponent mounted on said actuatorfor movements into and out of operative engagement with said drivenmember and being biased to move from a normal position in which it isdisengaged from said actuator into operative engagement therewith; atrigger mounted on said actuator and normally maintaining saidinterponent disengaged from said driven member, said actuator,interponent, and trigger constituting an assembly of conjointly movableparts; a typing control mechanism including an element manipulatable foractuating said trigger to release said interponent and enable it to moveinto engagement with said driven member whereby said actuator will bedriven by said driven member to operate said typing member during thecourse of which operation said interponent is thrown out of engagementwith said driven member; means for then returning said actuator towardsits normal non-actuated position, said typing control mechanismincluding means comprising a member operable by said manipulatableelement and being connected to and having a part movable with saidassembly during operating movements of said assembly for maintainingsaid trigger in actuated, interponent-releasing position, when saidmanipulatable element is held in manipulated position, whereby, duringreturning of said actuator towards its normal "non-actu! ated position,said interponent will re-engage said A'driven membei` to be repeatedlydriven thereby for effecting repeated driving of said actuator andrepeated typing operations of said typing member; and trigger-resettingmeans responsive to returning of said manipulatable element to normal,non-manipulated position for moving said trigger reversely to itsreleasing movement and thereby returning said interponent to its normalposition on said actuator.

15. In power operating mechanism for a typewriting or like machine, atyping member; a power-driven member; an actuator; means connecting saidactuator to said typing member; an y; interponent mounted on saidactuator for movements into and out of operative engagement with saiddriven member and being biased to move from a normal position in whichit is disengaged from said actuator into 'operative engagementtherewith; a trigger pivotally mounted on said actuator and normallymaintaining said interponent disengaged from said driven member, saidactuator, interponent, and trigger constituting an assembly ofconjointly movable parts; a re-setting cam face on said interponent; atyping control mechanism including an element manipulatable foractuating said trigger in one direction about its pivot to release saidinterponent and enable it to move into engagement with said drivenmember whereby said actuator will be driven by said driven member tooperate said typing member during the course of which operation saidinterponent is thrown out of engagement with said driven member; meansfor Y.

then returning said actuator towards its normal non-actuated position,said typing control mechanism including means comprising a memberoperable by said manipulatable element and being connected to and havinga part movable with said assembly during operating movements of saidassembly for maintaining said trigger in actuated, interponent-releasingposition when said manipulatable member is held in manipulated position,whereby, during returning of said actuator towards its normalnon-actuated position,

said interponent will re-engage said driven member to be repeatedlydriven therebyfor effecting repeated driving of said actuator andrepeated typing operations of said typing member; and means responsiveto returning of said manipulatable element to normal, non-manipulatedposition for rocking said trigger reversely about its pivot to move apart of said trigger against said re-setting cam face and thus move saidinterponent from engagement with said driven member.

16. In power operating mechanism for a typewriting or like machine, atyping member; a power-driven member; an actuator; means connecting saidactuator to said typing member; an interponent mounted on said actuatorfor movements into and out of operative engagement with said drivenmember and being biased to move from a normal position in which it isdisengaged from said actuator into operative engagement therewith; atrigger normally maintaining said interponent disengaged from saiddriven member; a typing control mechanism including a link pivotallyconnected at one of its ends to said actuator, a movable part to whichthe other en d oi said link is pivotally connected, and a manipulatableelement for moving said movable part, said link, and said actuator toactuate said trigger to release said interponent and enable it to moveinto engagement with said drivenj member 22Y whereby said actuator willbe driven by said driven member to operate said typing member during thecourse of which operation said interponent is thrown out of engagementwith said driven member; and means for then returning said actuatortowards its normal non-actuated position, saiwlink, when held in theposition to which it is moved by said manipulatable element and saidpart movable thereby, holding said actuator and interponent in positionfor reengagement of said interponent with said driven member when saidactuator is being returned toward its non-actuated position, therebyeffecting repeated driving of said actuator and said typing member bysaid driven member while said manipulatable member is held inmanipulated position.

17. In power operating mechanism for-a type- Writing or like machine, atyping member; a rotatable driven member; a movably mounted ac-h tuator;means operatively connecting said actuator to said typing member; aninterponent mounted movably on said actuator; a spring urging saidinterponent to move into drive-transmitting engagement with said drivenmember; a trigger mounted movably on said actuator and normallyoccupying a position in which it maintains said interponent out oidrive-transmitting engagement with said driven member, said actu-` ator,interponent, and trigger constituting an assembly of conjointly movableparts; an abutment; key-controlled means for moving said actuator tomove said interponent towards but not into engagement with said drivenmember and simultaneously to move said trigger into engagement with saidabutment to thereby actuate said trigger to release said interponent andenable the latter to be moved by said spring into drivetransmittingengagement with said driven member, whereby said actuator will be driventhrough said interponent until the latter isthrown out of engagementwith said driven member; means for urging said actuator' to return tonormal position upon such disengagement of said interponent from saiddriven member; a second abutment engageable by said trigger when saidactuator is so return-moved for returning said trigger to its initialposition on said actuator; and means associated with said trigger andsaid interponent for returning said interponent to its normal positionwhen said trigger is returned to its initial position, said keycontrolled means including mechanism comprising a'member connected toand having a part movable with said assembly during operating movementsof Said assembly for preventing engagement of said trigger with saidsecond abutment as long as said key-controlled means is in operatedposition.

18. In power operating mehanism for a typewriting or like machine, atyping member; a rotatable driven member; a movably mounted actuator;means operatively connecting said actuator to said typing member; aninterponent mounted movably on said actuator; a spring urging saidinterponent to move into drive-transmitting engagement with said drivenmember; a trigger mounted movably on said actuator and normallyoccupying a position in which it maintains said interponent out ofdrive-transmitting engagement with said driven member, said actuator,interponent, and trigger constituting an assembly of conjolntly movableparts; an abutment; keycontrolled means for moving said actuator to movesaid interponent towards but not. into engagement with said drivenmember and simultaneously to move said trigger into engagement with saidabutment to thereby actuate said trigger to release said interponent andenable the latter to be moved by said spring into drivetransmittingengagement with said driven me nber, whereby said actuator will bedriven through said interponent until the latter is thrown out oiengagement with said driven memblr; means for urging said actuator tomove reversely to the direction in which it was moved by saidkeycontrolled means and reverseiy to the direction in which it wasdriven by said driven member; a second abutment engageable by saidtrigger when said actuator is moved reversely to the direction in whichit was moved by said key-controlled means for returning said trigger toits initial position on said interponent; and means assoelated with saidtrigger and said key-controlled means including mechanism comprising amember connected to and having a part movable with said assembly duringoperating movements of said assembly and being eiective as long askey-controlled means is in actuated condition for preventing saidactuator from moving reversely to the direction in which it was moved bysaid key-controlled means while permitting said actuator repeatedly tomove alternately in the direction in which it is driven by said drivenmember and reversely thereto, whereby to effect repeated engagement anddisengagement of said interponent and said driven member with consequentrepeated operation of said typing member.

19. In power operating mechanism for a type- Writing or like machine, atyping member; a rotatable driven member; a movably mounted actuator;means operatively connecting said actuator to said typing member; aninterponent mounted movably on said actuator; a spring urging saidinterponent to move into drive-transmitting engagement with said drivenmember; a trigger mounted movably on said actuator and normallyoccupying a position in which it maintains said interponent out ofdrive-transmitting` engagement with said driven member; an abutment;key-controlled means for moving said actuator to move said interponenttowards but not into engagement with said driven member andsimultaneously to move said trigger into engagement with said abutmentto thereby actuate said trigger to release said interponent .and enablethe latter to be moved by said spring into drive-transmitting engagementwith said driven member, whereby said actuator will be driven throughsaid interponent until the latter thrown out of engagement with saiddriven me.A ber; means for urging said actuator to move reversely to thedirection in which it was moved by said key-controlled means andreversely to the direction in which it was driven by said driven member;a second abutment engageable by said trigger when said actuator is movedreversely to the direction in which it was moved by said key-controlledmeans for returning said trigger to its initial position on saidinterponent; and means associated with said trigger and said interpcnentfor returning said interponent to its normal position on said actuatorwhen said trigger is returned to its initial position on said actuator,said key-controlled means including a lever, a link pivotally connectedat its opposite ends respectively to said actuator and to said lever,and key-operated means for rocking said lever and thus moving said linkand said actuator, said link being effective as long as saidkey-operated means is in actuated condition for preventing saidactuatorfrom moving reversely to the direction in which it was moved bysaid key-controlled means while permitting said actuator repeatedly tomove alternately in the direction in which it is driven by said drivenmember and reversely thereto, whereby to efect repeated engagement anddisengagement of said interponent and said driven member with consequentrepeated operation of said typing member.

20. ln a power operating mechanism for a typewriting or like machine, atyping member; a rotatable driven member; a movably mounted actuatorextending transversely to the axis of rotation of said driven member andhaving a part thereon normally disengaged from said driven member butbeing engageable therewith upon being moved relatively toward saiddriven member for effecting driving of said actuator by said drivenmember; means operatively connecting said actuator to said typingmember; a key-operated lever; and a link extending substantiallytransversely to the direction of driving of said actuator by said drivenmember and being pivotally connected at its opposite ends respectivelyto said lever and to said actuator for moving said actuator relativelytowards said driven member to eiiect engagement of said part on saidactuator with said driven member and for holding said actuator againstreverse movement relatively away from said driven member whilepermitting said actuator to be driven by said driven member repeatedlyas long as said lever is in key-operated position.

21. In a power operating mechanism for a typewriting or like machine, atyping member; a rotatable driven member; a movably mounted actuatorextending transversely to the axis of rotation of said driven member andhaving a part thereon normally disengaged from said driven member butbeing engageable therewith upon being moved relatively toward saiddriven member for erecting driving of said actuator by said drivenmember; means operatively connecting said actuator to said typingmember; a single impression character key; key-actuated means operableby depression of said key for moving said actuator towards said drivenmember to effect engagement of said part on said actuator with saiddriven member whereby said actuator is driven by said driven member toeffect a single typing stroke of said typing member, said keyactuatedmeans including a part mounted to yield if said single impressioncharacter key is held depressed following driving of said actuator bysaid driven member so as not to interfere with returning of saidactuator to its normal position after being driven by said drivenmember; a repeat key; means including a pivoted link operable by saidrepeat key; a cne-way-acting connection between said link and saidactuator for transmitting motion from said link to said actuator formoving said actuator toward said driven member to bring said part onsaid actuator into engagement with said driven member and for holdingsaid actuator against reverse movement away from said driven memberwhile permitting said actuator to be driven repeatedly by said drivenmember as long as said repeat key is held in operated position, saidsingle impression character key and said repeat key being operableoptionally for effecting single or repeated operation of said actuator,said one-way-acting connection enabling said actuator to be moved tcwardsaid driven member without being restrained by said link when saidsingle impression character key is operated.

22. In a power operating mechanism for a typewriting or like machine, atyping member; a

25 rotatable driven member; a mcvably mounted actuator extendingtransversely to the axis of rotation of said driven member and having apart thereon normally disengaged from said driven member but beingengageable therewith upon being moved relatively toward said drivenmember for effecting driving of said actuator by said driven member;means operatively connecting said actuator to said typing member; asingle impression character key; key-actuated means operable bydepression of said key for moving said actuator towards said drivenmember to effect engagement of said part on said actuator with saiddriven member whereby 4said actuator is driven by said driven member toeffect a single typing stroke of said typing member, said key-actuatedmeans including a part mounted to yield if said single impressioncharacter key is held depressed following driving of said actuator bysaid driven member so as 'not to interfere with returning of saidactuator to its normal position after being driven by said drivenmember; a repeat key; means including a pivoted link operable by saidrepeat key; a pin-andslot connection between said link and said actuatorfor transmitting motion from said link to said actuator for moving saidactuator toward said driven member to bring said part on said actuatorinto engagement with said driven member and for holding said actuatoragainst reverse movement away from said driven member while permittingsaid actuator to be driven repeatedly by said driven member as long assaid repeat key is held in operated position, said single impressioncharacter key and said repeat key being operable optionally foreffecting single o:

repeated operation of said actuator, the slot of said pin-and-slotconnection extending in the direction in which said actuator is movedfor bringing said part on said actuator into engagement with said drivenmember, whereby when said single character impression key is depressedsaid actuator may be moved with the pin of said,

pin-and-slot connection moving idly relatively in the slot thereof,whereby said pin-and-slot connection imposes no restraint on movement ofsaid actuator by depression of said single character impression key.

23. In a power operating mechanism for a typewriting or like machine, atyping member; a rotatable driven member; a movably mounted actuatorextending transversely to and above the axis of rotation of said drivenmember and having a part thereon normally disengaged from said drivenmember but being engageable therewith upon being moved downwardly towardsaid driven member for effecting driving of said actuator horizontallyby said driven member; means operatively connecting said actuator tosaid typing member; a key-operated lever mounted above said actuator; adog pivotally mounted onl said lever and being engageable with saidactuator for moving the latter downwardly and being yieldablehorizontally so as not to interfere with horizontal movement of saidactuator when said key-operated lever is held in operated position; arepeat key; a second lever mounted below said actuator and beingoperable by said repeat key; a vertically extending link; a pivotalconnection between the lower end of said link and said second lever; anda pin-and-slot connection between the upper end of said link and saidactuator.

24.1n a power operated typewriter or like.

machine, a case shift element; a typing member having a type characterthereon effective forl typing only when said element is in shiftedposition; a power driven member; a rst actuator operatively connected tosaid case shift element and normally being disconnected from said powerdriven member but being connectable therewith for being driven therebyto move said element to shifted position; means including a manuallymanipulatable shift key operable for effecting connection of said first'actuator to said driven member; means effective when said shift key isin operated position for holding said element in shifted position; asecond actuator operatively connected to said typing member and normallybeing disconnected from said power driven member but being connectabletherewith for being driven thereby to operate said typing member; amanually manipulatable repeat key; means responsive to operation of saidrepeat key and remaining of said repeat-key in operated position foreffecting repeated connection of said second actuator with said drivenmember with consequent repeated power operation of said second actuatorby said driven member; and means on said repeat key for operating saidshift key when said repeat key is operated.

25. In a power operated typewriter or like machine, a case shiftelement; a typing member having a type character thereon effective fortyping only when said element is in shifted position; a power drivenmember; a rst actuator operatively connected to said case shift element;a first interponent mounted on said first actuator for movements intoand out of operative engagement with said power driven member and beingbiased to move into engagement therewith; a rst trigger normallymaintaining said first interponent disengaged from said power drivenmember: a second actuator operatively connected to said typing member;va second interponent mounted on said second actuator for movements intoand out of operative engagement with said power driven member and beingbiased to move into engagement therewith; a second trigger normallymaintaining said second interponent disengaged from said power drivenmember; a key; means responsive to depression of said key for actuatingboth said first trigger and said second trigger to release therespectively associated first and second interponents and enable them tomove into engagement with said power driven member to thereby effectpower driving of said first and second actuators by said driven memberto shift said element and operate said typing member; means effective aslong as said key is held depressed for retaining said case shift elementin shifted position; and means effective when said key is held depressedfor preventing returning of said second trigger and said secondinterponent to their normal positions on said second actuator, wherebysaid second interponent will remain positioned on said second actuatorfor repeatedly engaging and being driven by said power driven member aslong as said key is held depressed.

26. In a power operated typewriter or like machine, a case shiftelement; a typing member having a type character thereon effective fortyping only when said element is in shifted position; a power drivenmember; a first actuator operatively connected to said case shiftelement and normally being disconnected from said power driven memberbut being connectable therewith for being driven thereby to move saidelement to shifted position; a second actuator operatively connected tosaid typing member and normally being disconnected from said powerdriven member but being connectable therewith for being 27 driventhereby to operate said typing member; a repeat key; means responsive todepression of said repeat key for effecting connection of said first andsecond actuators with said power driven member whereby said actuatorsare operated by said power driven member respectively to shift said caseshift element and to operate said typing member; means renderedeffective when said first actuator has been operated and beingmaintained effective as long as said repeat key is held depressed forretaining said case shift element in operated position; and meanseffective as lone as said repeat key is held depressed for causingrepeated operation of said second actuator` by said power driven member.

27. In a power operated typewriter or like machine, a case shiftelement; a typing member having a type character thereon effective fortyping only when said element is in shifted position; a power drivenmember; a first actuator operatively connected to said case shiftelement and normally being disconnected from said power driven memberbut being connectable therewith for being driven thereby to move saidelement to shifted position; a second actuator operatively connected tosaid typing member and normally being disconnected from said powerdriven member but being conne/arable therewith for being driven therebyto operate said typing member; a manually operable shift key; meansresponsive to depression of said shift key for effecting connection ofsaid first actuator with said power driven member whereby said firstactuator will be power operated to shift said shift element; a manuallyoperable second key; means responsive to depression of said second keyfor effecting connection of said second actuator with said power drivenmember whereby said second actuator will be power operated to operatesaid typing member; and a one-way-acting connection for transmittingforce from said second key to said shift key for thereby depressing saidshift key concomitantly with depression of said second key when thelatter is depressed manually, said one-way-acting connection beingincapable oi transmitting force from said shift key to said second key.

28. In a power operated typewriter or lik machine, a oase shift element;a typing member having a type character thereon effective for typingonly when said element is in shifted position; a power driven member; afirst actuator operatively connected to said case shift element andnormally being disconnected from said power driven member but beingconnectable therewith for being driven thereby to move said element toshifted position; a second actuator operatively connected to said typingmember and normally being disconnected from said power driven member butbeing connectable therewith for being driven thereby to operate saidtyping member; a shift key; means responsive to depression of said shiftkey for effecting connection of said rst actuator with said power drivenmember whereby said first actuator will be power operated to shift saidshift element; a second key; means responsive to depression of saidsecond key for eecting connection of said second actuator with saidpower driven member whereby said second actuator will be power operatedto operate said typing member; a first bearing part on said shift key; apivoted lever having a second bearing part normally operativelydisconnected from said first bearing part; and means connecting saidsecond key to said lever and operable upon depression of said second keyfor rocking said lever to cause said second bearing part to bear on saidfirst bearing part and thereby depress said shift key.

29. In a power operated typewriter or like machine, a case shiftelement; a typing member having a type character thereon effective fortyping only when said element is in shifted position; a power drivenmember; a first actuator operatively connected to said case shiftelement and normally being disconnected from said power driven memberbut being connectable therewith for being driven thereby to move saidelement to shifted position; a second actuator operatively connected tosaid typing member and normally being disconnected from said powerdriven member but being conneotable therewith for being driven therebyto operate said typing member; a shift key; means responsive todepression of said shift key for effecting connection of said firstactuator with said power driven member whereby said first actuator willbe power operated to shift said shift element; a second key; meansresponsive to depression of said second key for effecting connection ofsaid second actuator with said power driven member whereby said secondactuator will be power operated to operate said typing member; anendwise movable thrust link connected at one of its ends to said secondkey and at its other end being formed with a fork; and a part fast withsaid shift key and being received by said fork so as to form therewith aone-way-acting connection for transmitting depressing movement of saidsecond key to said shift key but not from said shift key to said secondkey.

3G. In a power operated typewriter or like machine, a case shiftelement; a typing member having a type character thereon effective fortyping only when said element is in shifted position; a power drivenmember; a first actuator operatively connected to said case shiftelement and normally being disconnected from said power driven memberbut being connectable therewith for being driven thereby to move saidelement to shifted position; a second actuator operatively connected tosaid typing member and normally being disconnected from said powerdriven member but being connectable therewith for being driven therebyto operate said typing member; a manually operable shift key; meansresponsive to depression of said shift key for effecting connection ofsaid first actuator with said power driven member whereby said firstactuator will be. power operated to shift said shift element; a manuallyoperable second key; means 'responsive to depression of said second keyfor yeifecting connection of said second actuator with said power drivenmember whereby said second actuator will be power operated to operatesaid typing member; a one-way-acting connection for transmitting forcefrom said second key to said shift key for thereby depressing said shiftkey concomitantly with depression of said second key when the latter isdepressed manually, said one-way-acting connection being incapable oftransmitting force from said shift key to said second key; a third key;means responsive to depression of said third key for effectingconnection of said second actuator with said power driven memberindependently of operation of said second key and irrespective of theoperated or non-operated condition of said shift key and saidshiftelement; and another type character on said typing member effectivefor typing when' only said third key has been depressed.

31'.' In a power operated typewriter or like ber but being connectabletherewith for 'Y being driven thereby to operate said typing member; ashift key; means responsive to depression of said shift key foreffecting connection of saidirst actuator with said power drivenmember-whereby said first actuatorfwill be power operated to shift saidshift elemefit; means controlled said shift key and effectiveas long assaid shift 'key is held depressed for maintaining said shift element 20in shifted position; a'fsecond key; means ijesponsive to depression of'aid second key foreiecting repeated connection of said second actuatorwith said power driven member whereby said second actuator will be poweroperated repeatedly to operate said typing member; a one-` ay-actingconnection for transmitting depressing movement from said second key tosaid shift key but not from said shift key to said second key; a thirdkey; and means responsive to depression of said third key for effectinga single ioperative connection of said second actuator/ with said powerdriven member independently of operation of said second key. WILLIAM H.KU-PPER.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name y Date 1,614,475 Hokanson Jan; 18,1927 2,043,393 Pasinski June 9, 1936 2,310,717 Sundstrand Feb. 9, 19432,387,078 Kurowski Oct? 16, 1945

